Index to the US Patent Classification

Index to the US Patent Classification

What follows is part of the Index to the US Manual of Classifications for patents. As you scroll through the list and encounter a class/subclass of interest, you can jump back to the top and retreive patent titles by entering the class/subclass in the box below.


Enter a class/subclass code here to get a list of patent titles. Use any of the following forms:
363-131 121-55A 14-.5
that is, no embedded spaces, class and subclass seperated by a dash, and any subclass letters capitalized. Currently Design Patent titles (those in the classes of the form Dxx.yy) are not retreivable.

Enter class/subclass code:


FORMALDEHYDE ........................ 568/448
  DEHYDRATING .......................203/17
  SYNTHETIC RESIN (SEE SYNTHETIC RESIN OR NATURAL RUBBER
     RESIN OR NATURAL RUBBER)

FORMAMIDE ........................... 564/215

FORMATES
  ALKALI FORMING METAL ..............562/609
  CELLULOSE .........................536/67
  ESTERS ............................560/231+

FORMAZANS ........................... 534/652

FORMER (SEE DIE; MOLDING; SHAPING)

FORMIC ACID ......................... 562/609

FORMING
  METAL BY PLASTIC SHAPING ..........72
     FLUENT TOOL OR ENERGY FIELD ....72/54+

FORMS
  DISPLAY ...........................223/66+
     DESIGN .........................D20/10+
     DRESS ..........................223/68
  IN SITU CONSTRUCTION ENGINEERING OR
     BUILDING TYPE ..................249/1+

FORTE DEVICES SEE PIANO

FORTUNE TELLING DEVICES ............. 273/161
  COIN CONTROLLED ...................194
  PLAYING CARDS .....................D21/42+
  TOYS ..............................D21/240


FORWARD CHAINING .................... 395/52

FOUNDATION (SEE BASES)
  BEE COMB ..........................449/44+
  BUILDING ..........................52/292+
  HAIR ..............................132/54+
  MARINE ............................405/195.1+
     BALLASTED ......................405/207+
  PILES .............................405/231+
  ROAD BED ..........................404/27+

FOUNDING ............................ 164

FOUNDRY APPARATUS ................... 164

FOUNDRY MOLD OR MOLD CORE BINDER .... 523/139+


FOUNTAIN
  BEVERAGE INFUSER ..................99/313+
     GRAVITY FEED ...................99/310+
  COMB ..............................132/112+
  DESIGN ............................D23/201
     DRINKING .......................D07/304
     STOCK WATERING .................D30/121+
  DRINKING ..........................239/24+
     DESIGN .........................D07/304
  INKWELL (SEE INKWELL) .............222/577
  MACHINE
     BED AND PLATEN OSCILLATING
       PRINTING .....................101/315
     BED AND PLATEN RECIPROCATING
       PRINTING .....................101/321
     DAMPENER PLANOGRAPHIC ..........101/148
     INKER ..........................101/364+
     INKER MULTICOLOR ...............101/210
     INKER ROLLER ...................101/363
     PRINTING MEMBERS AND INKER .....101/330+
  PEN (SEE FOUNTAIN PEN)
  SPRINKLING ........................239/17+
     STENCIL ADDRESSING .............101/48+
  STOCK WATERING ....................D30/121+
  STOCK WATERING ....................119/74+
  SYRINGE ...........................604/131+
     GRAVITY FEED FROM PLURAL        604/80
       RESERVOIRS ...................604/80

FOUNTAIN PEN (SEE PENS) ............. 401
  BALL POINT ........................401/209+
     FOLLOWER FLUID .................401/142
  BIFURCATE NIB TYPE ................401/221+
     INK RETAINER ATTACHMENT AT TOOL 401/252+
  FILLING ...........................141/21+
  FILLING ...........................141/18+
  PROJECTABLE AND RETRACTABLE TOOL ..401/99+
  RUPTURABLE CARTRIDGE ..............401/132+
  SIGN OR PICTURE CARRYING ..........40/334+
  STYLOGRAPHIC ......................401/258+

FOURDRINIER MACHINES ................ 162/348+

FOURIER ANALYSIS .................... 324/76.21


FOWL ................................ 452+
  BROODERS ..........................119/31+
  BUTCHERING ........................452+
  CARE AND HANDLING DESIGN ..........D30
  CONFINING AND HOUSING DEVICES .....119/21+
     DESIGN .........................D30/108+
  FEEDING DEVICES ...................119/51.1+
  FOODS .............................426/635
  MEDICINES .........................424
  SUPPORTS AND SHACKLES .............452/188
  WATERING DEVICES ..................119/72+
     DESIGN .........................D30/121+

FOWLER FLAP FOR AIRCRAFT ............ 244/216

FRACTURE APPARATUS SURGICAL ......... 602/5+


FRAME ............................... 52
  ABRADING MACHINE ..................51/166.R+
  AGRICULTURAL IMPLEMENT ............172/776
  AIRCRAFT
     AIRFOIL ........................244/123+
     AIRSHIP HULL ...................244/125
     FUSELAGE .......................244/119+
  APPAREL
     ARMPIT SHIELD ..................2/57
     HAT ............................2/175.4+
  APPAREL APPARATUS
     DRESS COAT OR SKIRT STRETCHING .223/69
     HAT FRAME MAKING ...............223/8
     TIE ............................223/65
     TROUSERS STRETCHING ............223/63
  BAG HOLDER ........................248/99+
  BED ...............................5
  BEE
     COMB ...........................449/35+
     HIVE ...........................449/3+
  CAMERA ............................354/161
  CANOPY ............................135/101+
  CAR ROOF ..........................52/45+
  CASTER ............................16/31.R+
  CLOCK .............................368/88
  CLOCK .............................968/265+
  CLOSURES PARTITIONS PANELS ........160/371+
     AWNING .........................160/76
     MOUNT OR SUPPORT ...............160/369
     NONRIGID .......................160/354
     PLURAL .........................160/353
     ROLL TYPE ......................160/239+
  DOOR ..............................49/504+
     METAL ..........................52/782+
  DRILL PRESS .......................408/234+
  DRYING
     CURTAIN ........................38/102.1+
  ELECTRIC LAMP .....................314/130+
     ARC ............................314/130+
  FABRIC CLEANER ....................15/233
  FABRIC STRETCHING .................38/102.1+
  FASTENING SAVINGS BOX .............232/6
  FIREPLACE .........................126/500
  FISHING REEL ......................242/309+
  FOR BUILDING ......................52/648.1
  FOR EXPANSIBLE CHAMBER DEVICE .....92/161
  HAIR FOUNDATION ...................132/54
  HAND AND HOISTLINE IMPLEMENTS .....294/67.1+
     BRICK CARRIERS .................294/63.1+
     GRAPPLE ........................294/113+
     VACUUM .........................294/65
  HARVESTER .........................56
  HEADWEAR RECEPTACLE ...............206/9
  INTERNAL COMBUSTION ENGINE ........123/195.R
  LAND VEHICLE
     BODY STRUCTURE .................296/187+
     BODY SUPPORTING ................280/781+
     DESIGN .........................D12/159
     DROP FRAME CONVERTIBLE TO ......280/7.11
     DROPPED BODY ...................280/2
     ENDLESS TRACK CARRIED BY .......305/16+
     EQUALIZED ......................280/104+
     ROLLER BEARING .................280/105
     VELOCIPEDE .....................280/281.1+
     VELOCIPEDE STEERED .............280/274+
  LEATHER MAKING WORK HOLDER ........69/19
  LIGHT SHADE OR BOWL ...............362/433+
  LUGGAGE ...........................190/121+
  METALLIC RECEPTACLE WALL ..........220/668
  MIRROR OR REFLECTOR ...............52
  MOUNTED MOTOR .....................180/58+
  MUSIC
     HAMMER ACTION ..................84/250
     KEY ............................84/432
     PIANO ..........................84/184
  OPEN WORK .........................52/633+
  PANEL .............................52/474+
     EDGING .........................428/21+
     SECTIONAL ......................52/455+
  PAVEMENT LIGHT OR LENS ............404/22+
  PICTURE ...........................40/152+
  PICTURE FRAME MOLDING .............D25/119+
  PLANTING DRILL ....................111/52+
  PORTAL WITH BUILDING STRUCTURE ....52/204.1+
  PRINTING ..........................355/122+
  QUILTING ..........................112/119
  RADIATOR ..........................165/149
  RAILWAY
     BOGIE SIDE .....................105/206.1+
     CAR ............................105/396+
     LOCOMOTIVE .....................105/172+
  SCROLL SAW ........................83/776+
  SEWING ............................112/258+
  SHEET DRYING APPARATUS ............34/163
  SIFTING MACHINE ...................209/404+
  SIGN OR BULLETIN BOARD ............D19/52
  SLATE .............................434/422
  SPREADER ..........................294/81.1
  TABLE .............................248/163.1+
  TENT ..............................135/101+
  TEXTILE
     HAND LOOM ......................139/34
     PILE TUFTING TUBES .............139/10
  TEXTILE THREAD ....................28/149+
  TROLLEY POLE ......................191/65
  TRUNK .............................190/24
  TRUSS SURGICAL ....................128/99.1+
  TYPEWRITER ........................40/691+
  VENTILATING REGISTER ..............454/330+
  WALL DECORATION ...................D06/300+
  WINDOW ............................49/504+
  WIREWORKING .......................140/92.1
  WOODWORKING
     BIT ............................408/53
     CLAMPS .........................269
     HANDSAW ........................30/166.3+
     MATCH DIPPING ..................144/65

FRANGIBLE
  ATTACHMENT FOR METALLIC RECEPTACLE 220/89.1+
  BARREL BUNG .......................217/111
  BOTTLE OR JAR CAP .................215/250+
  BUILDING STRUCTURES ...............52/98+
  CARTRIDGE FOUNTAIN PEN ............401/132+
  DISPENSER OUTLET ..................222/542
  ELECTRIC SIGNAL BOX ELEMENT .......340/303
  ELEMENT IN PIPE JOINT .............285/3+
  FEATURE
     STATIC MOLD ....................249/61
  FLUID HANDLING MEANS ..............137/797
  LOCKS
     KEY BIT ........................70/410
     KEY OPERATING MECHANISM ........70/422
  MATERIAL USED IN GLASS PROCESS ....65/23
  METALLIC RECEPTACLE CLOSURE .......220/265+
  MULTIPLE SHOE BRAKE CONNECTION ....188/241
  RAILWAY SWITCH ELEMENT ............246/289
  RAILWAY TRAIN PIPE CLOSURE ........246/199
     DERAILMENT OPERATED TYPE .......246/172
  VALVE CONTROLLING ELEMENT .........137/68.1+

FRANKFURTER (SEE SAUSAGE)
  MAKING ............................452/30+
  PACKAGING .........................53/DIG.1

FRATERNAL INSIGNIA .................. D11/95+

FRAUD PREVENTOR OR DETECTOR
  CHECK CONTROLLED APPARATUS ........194/302+
     COMBINED .......................194/202+
  COATING OR IMPREGNATING ...........427/7+
  ELECTROPHOTOGRAPHIC COPIER ........355/201
  PRINTED MATTER ....................283/72+
  STOCK MATERIAL ....................428/916*
     TRANSFER OR DECALCOMANIA .......428/915*


FREE FALL ITEM FEEDING .............. 209/908*

FREE RADICAL, HYDROCARBON SYNTHESIS   585/942*
 INVOLVING ..........................585/942*

FREE WHEELING CLUTCHES .............. 192/41.R+

FREEZE-OUT TRAP ..................... 62/55.5

FREEZER AND FREEZING(SEE CONGELATION)
  FLOWABLE MATERIAL .................62/340+
     AUTOMATIC ......................62/135+
     PROCESS ........................62/66+
  ICE CREAM MACHINE DESIGN ..........D15/82
  PRESSURE COMPENSATORS .............138/27+
     FOR INTERNAL COMBUSTION
       ENGINES ......................123/41.5
  REFRIGERATOR-FREEZER DESIGN .......D15/81+
  SAFETY SYSTEMS FOR FLUID HANDLING .137/59+
  WORK HOLDER USING .................269/7

FREIGHT ACCOMODATION ON FREIGHT
 CARRIER ............................410
  LASHING ...........................410/96+
     ANCHOR .........................410/101+
  LOAD BRACE ........................410/121+
     BAR WALL-TO-WALL ...............410/143+
     PANEL WALL-TO-LADING ...........410/127+
     PANEL WALL-TO-WALL .............410/129+
     RETAINER .......................410/77+
     YIELDABLE ......................410/117+
  PARTICULAR ARTICLE ................410/2+
     AUTOMOBILE SHIPMENT ............410/4+
     GROUPED ........................410/31+
     MASSIVE ........................410/44


FREIGHT CARRIER
  FREIGHT ACCOMODATING CONSTRUCTION .410
  LAND VEHICLE ......................280
     BODY ...........................296
  RAIL CAR ..........................105/355+
     FRAMING ........................105/404+

FRENCH CURVES ....................... 33/561.2+

FRENCH DRESSING ..................... 426/615+

FRENCH FRYERS ....................... 99/403+

FREON  T M .......................... 570/134


FREQUENCY
  AMPLITUDE STUDY MECHANICAL ........73/579+
  ANALYZER ..........................324/76.12+
  AUTOMATIC CONTROL
     GAIN, LEVEL, VOLUME ............455/234.1
     PLURAL RECEIVERS ...............455/136
     SYSTEM RADIO ...................455/71
     TELEVISION RECEIVER ............358/194.1
     TRANSCEIVER ....................455/119
     TRANSMITTER ....................455/313+
  CHANGERS ..........................310/127+
  CONVERSION SYSTEMS ................363/157+
  CONVERTERS ........................310
     SYSTEMS ........................363/157+
  DEMODULATORS ......................329/315+
  DIVIDER ...........................363/157+
     ELECTRONIC TUBE TYPE ...........328/15
     ELECTRONIC TUBE TYPE ...........328/25
  DIVIDERS OSCILLATOR ...............331/51
  GROUP FREQUENCY RADIO SIGNALING ...455
  MEASURING .........................324/76.39+
     ABSORPTION TYPE ................324/76.51
     HETERODYNE .....................324/76.41+
     WAVE METER .....................250/250
  MODULATORS ........................332/117+
  MULTIPLIERS OSCILLATOR ............331/53
  RADIO SIGNALING ...................455
  RESPONSE MODIFICATION .............358/904*
  SPEECH RANGE COMPRESSION OR
     EXPANSION IN TELEPHONE SYSTEM ..381/29+
  SYNTHESIS .........................328/14

FREQUENCY SPECTRUM ALALYZER ......... 324/76.19

FRET SAWS ........................... 30/513+

FRETS FOR FINGERBOARDS OF STRINGED
 INSTRUMENTS ........................84/314.R
  CONTROL ...........................84/DIG.3


FRICTION
  CLUTCH ............................192
     BRAKE POSITION ADJUSTER
       COMBINED .....................188/199
  GEARING ...........................476+
     PLANETARY ......................475/183+
  GENERATORS
     BOILER HEATING .................122/26
     ELECTRIC .......................310/310
  HEATER ............................126/247
  IGNITING MASS OR SURFACE COMBINED
     WITH FUEL ......................44/506+
  PRODUCING COMPOSITIONS ............106/36
  REMOVABLE CLOSURE RETAINED BY .....220/352
  TAPE ..............................428/343+
     COATED ON BOTH SIDES ...........427/208
     PACKAGE ........................206/411
  TEST
     BETWEEN SOLID BODIES ...........73/9
     LIQUID VISCOSITY ...............73/54.4+
     TORQUE .........................73/862.12
  WELDING APPARATUS .................228/2.1
     NONMETALLIC ....................156/580.1
       METHODS ......................156/73.1+
       SONIC OR ULTRASONIC ..........156/580.1
     WELDING PROCESS, NONMETALLIC ...156/73.5
       SONIC OR ULTRASONIC ..........156/73.1

FRINGE
  APPAREL TRIMMING ..................2/244
  MAKING ON LOOMS ...................139/118+
  MISC  MANUFACTURE .................28/145+
  OF SEWN STRANDS ...................112/409
     DESIGN .........................D05/7+
  ON WEB OR SHEET ...................428/115+
  SEWING MACHINE FORMING ............112/64
  TRIMMING DESIGN ...................D05
  TURNING GUIDE FOR SEWING MACHINES .112/149
  WOVEN FABRIC ......................139/385

FRISBEE T M ......................... 446/46+

FRISKET ............................. 101/421


FRITS, GLASS COMPOSITIONS ........... 501/14+

FROG
  FLOWER STEM HOLDER ................47/41.13
     DESIGN .........................D11/147
  RAILWAY ...........................246/454+
     CONTINUOUS RAIL ................246/275+
     FROG OBVIATING SWITCHES ........246/417+
     SWITCH CONNECTED ...............246/382+
     SWITCH CONNECTED VEHICLE
       ACTUATED .....................246/274
     TROLLEY TRANSFER ...............104/105
  TEXTILE WEAVING ...................139/346

FRONT
  BOARDS ............................5/54
  BOILER ............................122/497+
  FIREPLACE .........................126/544+
     DESIGN .........................D23/343+
  FURNACE ...........................110/172
  UPENDING BEDSTEAD CASE
     PANEL ..........................5/160
     WING ...........................5/161
  WINTER OR STORM
     LAND VEHICLE ...................296/77.1+
     RAILWAY CAR ....................105/353

FROST INDICATOR FOR REFRIGERATOR .... 62/128

FROST PREVENTING
  COMPOSITION .......................252/70
     COATING ........................106/13
  PLANTS AND FRUIT ..................47/2
  REFRIGERATOR ......................62/272+
     AUTOMATIC ......................62/150+
     PROCESS ........................62/80+

FROSTING LAMP BULBS ................. 156/625+


FROTH ............................... 252/307
  FLOTATION .........................209/163+
     AGENTS .........................252/61
     COPPER .........................209/901*
     PHOSPHATE ......................209/902*
  PREVENTING ........................252/321

FRUIT ............................... 426/616+
  APPARATUS FOR TREATING ............99/467
  CLEANING
     BRUSHING OR WIPING APPARATUS ...15/3.1+
     FLUID TREATMENT APPARATUS ......134
     PROCESSES ......................426/478+
  CLIPPER ...........................30/123.5+
  COFFEE SUBSTITUTES FROM ...........426/594+
  CORER .............................99/547+
     DESIGN .........................D07/693
  GATHERER ..........................56/328.1+
     DESIGN .........................D08/13
  HALVING CUTTERS ...................83
  JUICE EXTRACTOR
     COMMINUTING CITRUS FRUITS ......99/495
     DESIGN .........................D07/665+
     INTERFITTING CUP TYPE PRESS ....10/213
     PRESSES ........................10/104+
  PEELERS OR PARERS .................99/588+
     DESIGN .........................D07/693
  PLANTS ............................PLT/33.1+
  PRESERVATION ......................426/321+
     CANNING ........................426/392
     COATING ........................426/289+
     DEHYDRATION ....................426/471+
     REFRIGERATION ..................426/524
  SEEDING AND STONING ...............99/547+
  SORTING MACHINES ..................209/509+
  STEMMER ...........................99/635+

FRYING PAN
  DEEP FAT ..........................99/403+
  HEAT TRANSFER FEATURE .............126/373+
  STRUCTURE .........................220
  SURFACE GRIDDLES ..................99/422+

FTORAFUR ............................ 544/313


FUCHSIN ACID ........................ 552/112

FUCHSINE ............................ 552/114+


FUEL ................................ 44
  BOUND ANIMAL BLOOD OR ANIMAL       44/552
     MANURE CONTAINING ..............44/552
  BOUND SEWAGE CONTAINING ...........44/552
  BOXES .............................126/283
  CAN ...............................D23/202+
  CELL ..............................429/12
     ACTIVE MATERIAL ELECTRODE ......429/27+
     AUTOMATIC CONTROL MEANS ........429/22+
     CATALYTIC ELECTRODE STRUCTURE ..429/40+
     CELL  ELECTRICAL GENERATOR .....429/12+
     CHEMICALLY SPECIFIED ELECTRODE .429/46
  COAL SLURRIES .....................44/280+
  DESIGN SOLID ......................D13/100
     MINERAL OIL ....................208/15
  FEED AND SUPPLY SYSTEMS ...........137
     ENGINE COMBINED GENERALLY ......60
     ENGINE INTERNAL COMBUSTION
       COMBINED .....................123/495+
       FUEL INJECTION ...............123/445
       ROTARY PISTON ................123/200+
     LIQUID FUEL NOZZLE GENERALLY ...239
     SOLID FUEL BURNERS COMBINED ....110/101.R+
     WITH COMBUSTION FEATURE ........431
  GAS
     DISTRIBUTION ...................48/190+
     GENERATOR ......................48/61+
  GASEOUS ...........................48
  GELLED LIQUID .....................44/265+
  HEAT EXCHANGE FEATURE .............429/26+
  HIGH ENERGY COMPOUNDS .............149/120+
  IGNITING DEVICES & FUEL ...........44
  INJECTOR COMBINED WITH ROTARY
     PISTON ENGINE ..................123/200+
  LIQUID ............................44/300+
     ACYCLIC PEROXY COMPOUND         44/322
       CONTAINING ...................44/322
  LIQUID HYDROCARBON MONOMER MIXTURES585/1+
     ALDEHYDE OR KETONE CONTAINING ..44/437+
     AZO COMPOUND CONTAINING ........44/328
     CARBOHYDRATE CONTAINING ........44/313
     CARBOXAMIDE CONTAINING .........44/418+
     EXPLOSIVE OR THERMIC CONTAINING 149/1
     FREE METAL OR ALLOY CONTAINING .44/321
     HALOHYDROCARBON CONTAINING .....44/456
     HEAVY METAL CONTAINING EXCEPT   44/354+
       LEAD .........................44/354+
     HETEROCYCLIC COMPOUND CONTAINING44/329+
     INORGANIC COMPOUND CONTAINING ..44/457+
     MATERIAL, ACTINIDE OR423/249
       RADIOACTIVE INORGANIC COMPOUND423/249+
     NITRATE OR NITRITE ESTER        44/323+
       CONTAINING ...................44/323+
     NITRILE OR ISONITRILE CONTAINING44/384
     NITRO COMPOUND CONTAINING ......44/413+
     ORGANIC AMINE CONTAINING .......44/412+
     ORGANIC CARBOXYLATE CONTAINING .44/388+
     ORGANIC OXYGEN COMPOUNDS        44/436+
       CONTAINING ...................44/436+
     ORGANIC SULFATE CONTAINING .....44/369
     ORGANIC SULFONATE CONTAINING ...44/370+
     ORGANIC SULFUR OR ORGANIC       44/435+
       PHOSPHORUS CONTAINING ........44/435+
     ORGANO LEAD COMPOUNDS44/454+
       CONTAINING ...................44/454+
     PHOSPHORUS ORGANIC ACIDS OR     44/375+
       ESTERS CONTAINING ............44/375+
     QUINONE CONTAINING .............44/312
     SILICON CONTAINING .............44/320
     SOLID HYDROCARBON POLYMER       44/459
       CONTAINING ...................44/459
     SOLIDIFYING ....................44/265+
     UREA OR THIOUREA CONTAINING ....44/417
  LOG ...............................44/535
  MINERAL OIL .......................208/15+
  NUCLEAR ...........................976/DIG.37+
  NUCLEAR ...........................376
     ALLOYS FOR  ACTINIDE GROUPS ....420/1+
     BLANKET ARRANGEMENTS ...........376/172
     BUNDLE OR PACK .................376/434
     BY-PRODUCT TREATMENT ...........376/189
     CANNED .........................376/412
     CARRIER, INSERTABLE ............376/342
     CLADDING .......................376/457
     COATED OR IMPREGNATED ..........376/414
     COMPLEMENTARY SEGMENTS .........376/429
     COMPOSITIONS ...................252/626+
     CONCENTRIC LAYERS ..............376/431
     COOLANT INCLUDED ...............376/424
     CORE ARRANGEMENTS ..............376/348
     ELECTROLYLIC PRODUCTION ........204/1.5
       IN FISSION PLENUM ............376/412
       PARTICLES ....................376/411
       REPROCESSING .................423/249+
     HANDLING .......................376/260
     LAYERED ........................376/416
     LEAK DETECTING .................376/250
       WARNING STRUCTURE ............376/450
     LOADING AND UNLOADING ..........376/264
     MANUFACTURING
       CHEMICAL MILLING .............156/625+
       CHEMICAL, MISC ...............156/67
       COATING ......................427/6+
       ETCHING ......................156/625+
       IRRADIATION OR CONVERSION ....376/156
       LAMINATING ...................156/67
       METAL STOCK HEAT TREATED .....148/401+
       METALLURGICAL PRODUCTION .....75/393+
       METALLURGICAL PRODUCTION .....420/1+
       POWDER METALLURGY ............419
     MATERIAL, ACTENIDE OR376/901*
       RADIOACTIVE X-REF PATENTS ....376/901*
       ALLOY ........................376/422
       ORGANIC COMPOUNDS ............534/10+
     MECHANICAL SPACING   376/438
       MEANS OR SECURING ............376/438
     METAL HEAT TREATMENT ...........148
     MOLTEN .........................376/359
     PROJECTIONS, PRONGS  FINS ......376/454
       METAL ALLOYS .................420/1+
     SEAL FOR .......................376/451
     SEGMENTED ......................376/426
       NON-METAL ....................264/21+
       X-ART ........................376/903*
     SINTERED  PROCESS ..............419
     SINTERED  STOCK ................75/228+
     SLURRY, ASSOCIATED COMPONENTS ..376/356
     SLURRY, CONVERSION PROCESS .....376/171
     SPACING MEANS OR SECURING ......376/438
     WASTE DISPOSAL .................252/626+
  NUCLEAR DEVICE MAKING .............29/DIG.9
  PLURAL CELLS ......................429/18+
  PROCESS OF OPERATING ..............429/13+
  PUMPS .............................415
     PUMP ...........................417
     SERVICE STATION PUMP ...........D15/9.1+
  REFRIGERANT UTILIZED AS ...........62/7
  SERVICE STATION PUMP ..............D15/9.1+
  SOLID AND LIQUID ..................44
  SOLID COMPOSITIONS WITH BINDER     44/551+
     AND ADDITIONAL COMPONENT .......44/551+
  SOLID ELECTROLYTE .................429/30+
  SOLID WITH BINDERS ................44/551+
     WITH BINDERS ...................44/551+
  SPREAD OUT INTO A FILM ............261/DIG.25
  TESTING CONSUMPTION ...............73/113+
  TREATMENT, SOLID FUEL FURNACE .....110/218+

FULCRUM
  BRAKE BEAM TYPE ...................188/231+

FULL STROKE MECHANISM ............... 74/17.5
  DISPENSERS
     PUMP TYPE ......................222/375

FULL WAVE GAS RECTIFIER ............. 313/581
  HIGH VACUUM RECTIFIER .............313/306


FULLER'S EARTH
  ADSORBENT .........................502/232+
     CARBON COMBINED ................502/180

FULLING ............................. 26/19+
  HIDE APPARATUS ....................69/33+
  INORGANIC EXPLOSIVE OR ............149/33+
     THERMIC COMPOSITION CONTAINING .149/33+

FULMINATING IGNITER ................. 431/269+

FUMARIC ACID ........................ 562/595

FUME ARRESTER
  CONSUMABLE ELECTRODE DISCHARGE     314/26
     DEVICES ........................314/26+
  GAS SEPARATION ....................55
  HOODS .............................454/49+
     DESIGN .........................D23/371+
  METALLURGICAL APPARATUS ...........266/144+
  TEXTILE FLUID TREATING ............68/209

FUME GENERATOR ...................... 422/305+

FUMIGANTS ........................... 424/40+

FUMIGATION .......................... 422
  ANIMAL ............................119/160
  FOOD ..............................426/312+
     APPARATUS ......................99/467
  SOILS .............................47/58
  VERMIN DESTROYING .................43/125+


FUNGI (SEE ALSO YEAST AND MUSHROOM)
  COMPOSITIONS ......................435/171
     BODY TREATING ..................424/93.R
     EDIBLE PRODUCTS ................426
       SINGLE CELL PROTEIN ..........435/804*
     PROTEIN EXTRACTS FROM ..........530/371
  FUNGI, PER SE, CULTURE METHODS ....435/254.1+
     SPECIES CROSS-REFERENCE ........435/911+
     TRANSFORMANTS ..................435/254.11+
  MEASURING AND TESTING .............435/7.31

FUNGICIDES
  ANIMAL DIPS AND SPRAYS ............424
  CYANOGEN COMPOUNDS ................424/607+
  FERTILIZERS CONTAINING ............504/101+
  FUMIGANTS .........................424/40+
  INORGANIC .........................424/607+
  OIL EMULSIONS .....................514/938
  ORGANIC ...........................514/1+
  SUSPENDING AGENTS & SPREADERS .....514/769+

FUNGISTATIC
  COMPOSITIONS ......................424

FUNNEL .............................. 141/331+
  CHEMISTRY LAB APPARATUS ...........422/99
  DISPENSER WITH FUNNEL TYPE OUTLET .222/460+
  DISPENSER WITH SEPARABLE ..........141/343
  HOUSEHOLD ARTICLE DESIGN ..........D07/700
  LIQUID LEVEL OR DEPTH GAGE HAVING .73/294
  MILK RECEPTACLES WITH FUNNEL
     FILLER .........................232/43
  SUPPORTS FOR ......................248/94


FUR SEE PELTS
  ARTIFICIAL ........................428/85+
  CAPE DESIGN .......................D02/832
  COAT DESIGN .......................D02/832+
  COLLAR ............................D02/602+
  CUTTING ...........................83/915*
  FLUID TREATMENT ...................8/94.14
     DYEING .........................8/404+
  GARMENTS ..........................2/65+
     DESIGN .........................D02
  LEATHER MANUFACTURES DERIVED FROM
     FURS AND RELATED PROCESSES .....69/23+
  NECKWEAR DESIGN ...................D02/601+
  RECEPTACLES FOR ...................206/11
  SCARF OR MUFF HANGERS .............223/97
  SEWING MACHINES ...................112/16+
  TREATING APPARATUS ................69/23+

FURAN ............................... 549/505

FURFURAL ............................ 549/483

FURFURAMIDE ......................... 266/144

FURLING ............................. 114/104+


FURNACE (SEE HEAT) .................. 110
  ABSORBER WITH MANUALLY ADJUSTABLE
     SHADING MEANS ..................126/703
  ARC ...............................373/60+
  ASH RECEIVING AND HANDLING DEVICES 110/165.R+
  AUTOMATIC TEMPERATURE CONTROL .....236
  BESSEMER CONVERTER ................266/243+
  BOILER CONTROLLED
     AIR OR STEAM FEED ..............110/188
     FUEL FEEDER ....................110/103
     STOKER .........................110/186+
  CAR TYPE ..........................432/241
  CHARGE CONVEYOR WITHIN ............414/150+
  CHARGING AND DISCHARGING ..........414/147+
     DISTILLATION APPARATUS .........202
     METAL CHARGE ...................75/303+
       SHAPED .......................428/576
  CHECKER BRICK .....................165/9.1+
  CHEMICAL REACTION .................422/198+
  COKE ..............................202/215+
  COLLECTOR INCLUDES ROOF 126/622
     SHINGLES OR TILES ..............126/622
  CREMATING .........................110/194
  CUPOLA ............................432/95+
     METALLURGICAL ..................266/197+
     METALLURGICAL, X-ART ...........266/900*
  DESIGN ............................D23/329
  DISTILLING AND COMBUSTIBLE GAS
     GENERATING
     BURNING COMBINED ...............110/229+
     GAS GENERATORS .................48/61+
     MINERAL OIL VAPORIZING .........208/347+
     STILLS .........................202/81+
  DOORS .............................110/173.R+
  DRAFT REGULATORS ..................110/147+
  ELECTRIC ..........................373
     ARC FURNANCE ...................373/60+
     ELECTRON BEAM ..................373/10+
       ZONE MELTING .................373/17
     GLASS FURNACES .................373/27+
     GLOW DISCHARGE .................373/26
     INDUCTION FURNACES .............373/138+
       CHANNEL ......................373/162
       CORE-TYPE ....................373/159
       CORELESS .....................373/151
       LINING .......................373/164+
       MAKING OF LINING .............264/30+
       ZONE MELTING .................373/139
     PRESSURE AND VACUUM FURNACE ....373/60+
       ARC WITH INTERNAL ATMOSPHERE  373/68
        CONTROL .....................373/68
       FURNACE BODY DETAIL ..........373/71
     RESISTANCE FURNACE .............373/109+
     WALL COOLED FURNACE
       ARC FURNACE DEVICE ...........373/75+
       INDUCTION CORE-TYPE ..........373/165
       INDUCTION CORELESS ...........373/158
       INDUCTION FURNACE DEVICE .....373/138+
       RESISTANCE FURNACE DEVICE ....373/113+
     WITH CONDENSERS ................373/56+
     ZONE MELTING ...................373/17+
  ELECTRON BEAM .....................373/10+
     ZONE MELTING ...................373/17
  FLUID FUEL BURNER IN ..............431/159+
     SOLID FUEL COMBINED ............110/260+
  FRONTS ............................110/172
  FUEL FEEDERS ......................110/101.R+
  GAS SCRUBBERS .....................261/DIG.9
  GASES
     COMBUSTION AIR HEATING .........110/303
     HEATING BOILER FEED WATER ......122/420+
     POWER PLANT WATER HEATING ......60/669
  GLASS
     ANNEALING ......................65/349+
     ELECTRIC .......................373/27+
     MELTING ........................432/195+
     MELTING AND REFINING ...........65/347
     POT TYPE .......................432/156
  HAZARDOUS WASTE DESTRUCTION .......588
  INCINERATOR .......................110/235+
  LIQUID HEATING OR EVAPORATING
     AIR HEATER COMBINED ............126/101
     CONCENTRATORS ..................159
     COOKING STOVE COMBINED .........126
     FIREPLACE COMBINED .............126/513+
     OPEN TYPE ......................126/344+
     PRESSURE GENERATING BOILERS ....122
  MELTING ...........................266/200+
  METALLURGICAL
     APPARATUS ......................266
     PROCESSES ......................75
  MISCELLANEOUS HEATING .............432
  NUCLEAR ...........................376/366
  OPEN HEARTH .......................432/159+
  POTS ..............................432/262+
  POWDERED FUEL BURNING
     FLUID FUEL COMBINED ............110/260+
     FUEL FEEDERS ...................110/104.R+
     FURNACE STRUCTURE ..............110/263+
  PUDDLING ..........................266/203
  RECUPERATOR .......................432/179
  REGENERATIVE ......................432/180
  SAWDUST REFUSE AND WET FUEL .......110/235+
     FEEDERS ........................110/102
     STOVES .........................126/222+
  SHAFT .............................432/95+
     METALLURGY .....................266/197+
  SMOKESTACKS .......................110/184+
  SOLID FUEL BURNING ................110
     STOVES .........................126
  SPARK AND SMOKE CONDUCTORS ........110/145+
  SPARK ARRESTERS ...................110/119+
  STOKERS ...........................241/600*
  STOVES & FURNACES .................126
  TOXIC WASTE DESTRUCTION ...........588
  TUYERES ...........................110/182.5+
  WALL MANUFACTURE AND REPAIR .......264/30

FURNITURE
  BEDS ..............................5
  CABINETS ..........................312
  CHAIRS AND SEATS ..................297
  DESIGN ............................D06
  DOLL OR TOY .......................446/479+
     DESIGN .........................D21/121
  DRY CLOSET COMBINED ...............4/465+
  EDUCATION FEATURES COMBINED .......434/432
  FIRE ESCAPE COMBINED ..............182/35+
  ILLUMINATOR COMBINED ..............362/127+
  INSECT TRAP COMBINED ..............43/109
  MUSIC CABINET .....................84/DIG.17
  POLISH ............................106/3+
  PROTECTOR OR COVER ................D06/610+
  RACKS AND STANDS FOR ..............211/27
  SHIP FURNITURE AS LIFE RAFT .......441/125+
  SHIPS .............................114/188+
  STORE DESIGN ......................D06
  TABLES ............................108
  TOY ...............................D21/121

FUROIC ACID ......................... 549/484+

FURRING (SEE STUDDING) .............. 52/474+
  SETTABLE MATERIAL BACKER ..........52/344+

FURROWER ............................ 172
  FURROW FOLLOWERS ..................280/776
  IRRIGATION DAM FORMER .............172/233+
  PLANTING DRILL ....................111/149+
  ROLLER COMBINED ...................172/176

FURYL COMPOUNDS ..................... 549/429+
  AZO COMPOUNDS .....................534/751+


FUSE
  AMMUNITION AND EXPLOSIVE DEVICE ...102/200+
     BLASTING .......................102/200+
     CORDEAU DETONANT ...............102/275.1+
     MINE ...........................102/424+
     MINE MARINE TYPE ...............102/416+
  COMBINED WITH FUEL ................44/519
  CONDITION, ELECRIC SIGNAL .........340/638+
  CUTTER BLASTING ...................86/22
  ELECTRIC ..........................D13/161
     BOX ............................D13/178
     CONNECTOR COMBINED .............337/187+
     THERMAL ........................337/401+
     THERMAL CURRENT ................337/142
  ELECTROPHOTOGRAPHIC FIXATION ......355/282+
  FUSIBLE ELEMENTS ..................169/42
     BUILDING STRUCTURES COMBINED ...52/232
  HOUSING OR MOUNTING ASSEMBLY ......174/52.1+
     WITH ELECTRICAL COMPONENT
       OR DEVICE ....................361/837
  MAKING ............................493/948*
  MEASURING AND TESTING TIMING       73/5
     APPARATUS ......................73/5
  OPERATED
     ALARM ..........................116/106
     SAFETY DEVICES FOR FIRE
       EXTINGUISHERS ................122/504.3
     SAFETY DEVICES FOR LIQUID
       HEATERS AND VAPORIZERS .......122/504.1
     STOVE AND FURNACE DAMPERS ......126/287.5
  PROXIMITY .........................102/211+
  PULLER TOOL .......................81/3.8
  SETTERS, ORDNANCE .................89/6+

FUSED CELL FORMATION ................ 435/172.2
  X-ART COLLECTION ..................935/93*

FUSEE ............................... 102/358

FUSELAGE
  AIRCRAFT CONSTRUCTION .............244/119+
  LIFTING TYPE ......................244/36


FUSIBLE
  BOILER SAFETY CONTROL .............122/504.1
     FIRE EXTINGUISHER ..............122/504.3
  BOLT OR NUT, IN BOLT OR NUT TO     411/171
     SUBSTRUCTURE LOCK ..............411/171
  CONNECTIONS .......................169/42
  METAL, IN BOLT TO NUT LOCK ........411/257
  PLUGS FOR AUTOMATIC FIRE169/37
     SPRINKLER HEADS ................169/37+
  RECEPTACLE ATTACHMENT .............220/89.3
  SENSOR SIGNAL SYSTEM ..............340/590+
  STOVE DAMPER RELEASE ..............126/287.5
  SWITCH ............................337/401+
     THERMAL CURRENT ELEMENT ........20
     THERMAL CURRENT HEATER .........337/182+
  THERMOMETER .......................374/106
  VALVE OPERATOR ....................137/72+
  VALVES AND CONTROLLERS ............222/54
     FIRE EXTINGUISHER ..............169/19+
  VENTILATOR COWL RELEASE ...........454/28

FUSION (SEE MELTING)
  BONDING APPARATUS .................228
  COATING COMBINED ..................427/375
  SEPARATION COMBINED ...............422/285+
  SULPHUR ...........................423/567.1

FUSION BONDING
  GLASS PREFORMS OF .................65/36+
     APPARATUS ......................65/152+

FUSION NUCLEAR REACTORS ............. 376/100

FUZZY LOGIC
  APPLICATIONS ......................395/900*
  COMPUTER ..........................395/1
  CONTROLLER ........................395/1
  EXPERT SYSTEM .....................395/61